衰变曲线 shuāibiànqūxiàn decay curve Origin Definitions Defs Strokes Stroke Words Sentences Sents 衰变 衰變 shuāibiàn decay radioactive decay; process where an unstable atomic nucleus loses energy by radiation or changes into a more stable element曲线 曲線 qūxiàn noun curve a curved line; (geometry) the trajectory of a moving point